Caramba,
You beat me to it, while I was reminding myself of the alphabet soup model designations.
It is certainly a flapless Citabria, with a carburettor and a fixed-pitch prop, and given the fake wood grain panel, I agree that the 7GCAA is the more likely model. I've never seen a Citabria with an AH or DI before, but I've seen lots with that rat's nest look under the panel!
I resisted the temptation to look up N9574S
I42